Friction twisting apparatus



Dec. 9, 1969 5,.1. BERGER, JR 3,432,384

FRICTION TWISTING APPARATUS Filed Dec. 13, 1967 2 Sheets-Sheet lINVENTOR. ii=1 Emil J. Berger, J11

ATTORNEYS.

Dec. 9, 1969 E. J.BERGER, JR

FRICTION TWISTING APPARATUS 2 Sheets-Sheet 2 Filed Dec. 13, 196'?INVEOR. Emil J. Berger, Jr.

WJWM

ATTORNEYS.

United States Patent 3,482,384 FRICTION TWISTING APPARATUS Emil J.Berger, Jr., Wayne, Pa., assignor to Turbo Machine Company, Lansdale,Pa., a corporation of Pennsylvania Filed Dec. 13, 1967, Ser. No. 690,294Int. Cl. D01h 13/26, 7/92, 7/46 US. Cl. 57-34 18 Claims ABSTRACT OF THEDISCLOSURE An apparatus is provided for facilitating the texturizing andbulking of a plurality of yarns prior to conveying the yarns to aknitting portion of a knitting machine, the apparatus being adapted forfalse twisting yarns and heatsetting the yarns in their zone of falsetwist. A particularly novel means comprising oppositely movable beltruns is utilized for applying the false twists in a continuous manner,during longitudinal movement of the yarns. The twists are then removedfrom the yarns by passing the yarns between a downstream set of niprolls, the yarns becoming unt-wisted following their passage through thenip rolls due to the substantially increased length of the yarnsdownstream of the downstream nip rolls for receiving the twist from thetwist zone.

BACKGROUND OF THE INVENTION In yarn texturizing apparatus of the priorart, it is conventional to twist yarns in pairs, and then to separatethe twisted pairs of yarns by passing each yarn in a pair over a set ofseparating pins, such as disclosed in the patent to Carruthers No.3,091,908. While the yarns are in their twisted condition, the yarns areheat-set, the subsequent separating step being operative to re-orientthe yarn filaments, thereby providing a texturized or bulked yarnproduct. In apparatus of the prior art type, beside requiring that yarnsbe twisted in pairs, it has heretofore been necessary to pre-twist theyarns either by hand or otherwise, in a separate operation. Such aseparate operation has generally been conducted at a high rate of speed,in order to facilitate economy of operation, in that, after texturizingthe yarns, other operations were necessary, such as winding the yarns onbobbins, placing the bobbins in a creel, unwinding the bobbins onto abeam, such as one of the tricot type, in parallel relation, all prior tofeeding the yarns to a knitting machine at a relatively slow speed.

SUMMARY OF THE INVENTION The present invention seeks to provide asubstantial improvement to the prior art, in providing an apparatuswhich is adapted to continuously apply false twist to individual yarns,during longitudinal movement of the yarns through a twist zone, whilesetting the filaments of the yarns in the twist zone, to providetexturized and highly bulked yarns directly to a knitting, weaving ortufting machine, at machine feed speeds, or onto a bobbin or spool orthe like, or to any other such yarn processing machines including yarndyeing equipment and the like.

Accordingly, it is a primary object of this invention to provide anapparatus for facilitating the texturizing of yarns by moving the yarnsalong paths, and false twisting the yarns individually, during theirmovement along their paths, and setting the twisted yarns, prior tountwisting the yarns.

It is another object of this invention to provide an apparatus of theabove-discussed type, wherein the false twist is applied to the movingyarns by means of transversely disposed continuously oppositely movablebelt runs which frictionally engage and apply the false twist to theyarns.

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It is a further object of this invention to accomplish each of the aboveobjects, wherein the belt runs are offset longitudinally of the machine,as well as vertically, such that yarns passing therebetween are forcedto follow the contour of each of the belt runs for a short distance,whereby the yarns passing between the belts do not follow a straightline path, but follow a path having a vertical offset therein.

It is a further object of this invention to provide an apparatus forapplying a false twist to continuously moving yarns passing between apair of oppositely moving belt runs, wherein the yarns are frictionallyengaged and are carried transversely of the machine direction for ashort distance, thereby resulting in a slight angular disposition ofyarns moving downstream toward the belt runs, such slight angulardisposition being relative to a longitudinal straight-line direction ofyarn travel through the apparatus.

It is a further object of this invention to provide an apparatus forfacilitating the provision of texturized yarns, such that yarns arecontinuously conveyed along paths in which the paths pass through twistzones wherein they are engaged by oppositely moving belt runs and arecontinuously twisted and heat-set within the twist zone, with meansbeing provided for applying twist to the yarns in opposite directionsacross the apparatus, for balancing twist forces across a knittingmachine or the like to which the apparatus may be connected.

It is another object of this invention to provide a knitting machineembodying the various apparatus characteristics set forth in theabove-mentioned object paragraphs, wherein the texturized yarns aredirectly fed into knitting portions of knitting machines.

It is yet another object of this invention to provide a novel method ofcontinuously and simultaneously applyin-g false twist to a plurality ofmoving yarns.

Other objects and advantages of this invention will be apparent to thoseskilled in the art, from the following general and detailed descriptionof the preferred embodiment, the drawings, and appended claims.

In the drawings:

FIGURE 1 is a top plan view of the continuous yarn twist apparatus ofthis invention, mounted on the frame of a knitting machine or the like,the knitting machine being fragmentally illustrated, wherein the pathsof yarn travel are clearly illustrated.

FIGURE 2 is a longitudinally sectional view, schematically illustrated,of the machine of this invention taken generally along the line IIII ofFIGURE 1, and wherein the upper and lower yarn runs are clearlyillustrated, for providing texturized yarn to a knitting machine or thelike, wherein adjacent yarns have been alternately twisted.

FIGURE 3 is a transverse sectional view of the apparatus of thisinvention, taken generally along the line HIIII of FIGURE 1, and whereinthe pulley systems which provide the means for twisting the yarns arebest illustrated.

FIGURE 4 is an enlarged fragmentary detail view of that portion ofFIGURE 3 designated by the numeral IV, and wherein there is clearlyillustrated the manner in which oppositely moving belt runs engage aboveand below vertically offset yarn portions, for providing clockwise yarntwisting.

FIGURE 5 is an enlarged fragmentary detail view of that portion ofFIGURE 3 designated by the numeral V,

and wherein there is clearly illustrated the manner in which oppositelymoving belt runs engage above and below vertically offset yarn portions,for providing counterclockwise yarn twisting.

Referring now to the drawings in detail, reference is first made toFIGURE 1, wherein there is illustrated a portion 10 of a knittingmachine, comprising opposite frame sides 11 and 12 which have respectiveframe side extensions 13 and 14.

The frame side extension 13 includes, at the extreme right end thereof,as viewed in FIGURE 1, an inwardty projecting beam journal portion 15.

Similarly, the frame side extension 14 has connected thereto a beamjournal portion 16, offset from the side extension 14 by a transverselydisposed frame portion 17. A beam 18, having axially extending shaftportions and 21 is carried between the axially inwardly directed journalportions 15 and 16, in transversely offset relation to an imaginarylongitudinal center line of the knitting machine 10.

A sley bar 22 having a plurality of upstanding guide pins 23 thereon isdisposed transversely of the clockwise twisting texturizing apparatusgenerally designated by the numeral 24, between the frame sideextensions 13 and 14.

A pair of nip rolls 25 and 26 are disposed downstream of the sley bar22, in vertically aligned relationship, to

effect a nip therebetween. The rolls 25 and 26 are also carried at theirends by the frame side extensions 13 and 14.

A heater 27 is disposed between the frame side extensions 13 and 14,downstream of the nip rolls 25 and 26, the heater 27 having upper andlower arcuately curved surfaces 28 and 30, respectively.

A mounting bracket 31 is carried by the frame extension 14, downstreamof the heater 27, and has a sley bar 32 mounted thereon, extendingtransversely of the texturizing apparatus 24, the sley bar 32 having aplurality of upstanding pins 33 across its width, for guiding yarnstherebetween.

A pair of carrier brackets 34 and 35 extend inwardly of the respectiveframe side extensions 13 and 14, and carry a sley bar 36 therebetweenupon which is mounted a plurality of upstanding separator pins 37, theseparator pins 37 being disposed along the bar 36 transversely thereof,for guiding and separating yarns passing therebetween.

The carrier bracket 34 carries longitudinally disposed shafts 38 and 40upon which a pair of pulleys 41 and 42 are respectively rotatablycarried. Similarly, a pair of shafts 43 and 44 extend longitudinallyupstream or rightward, as viewed in FIGURE 1, carrying respectivepulleys 45 and 46 rotatably mounted thereon.

A pulley belt 47 is carried by and between pulleys 41 and 45, and has arun 48, disposed adjacent a run 51 of a pulley belt 50, carried betweenthe pulleys 42 and 46. The yarns conveyed longitudinally of theapparatus 24 are adapted to pass between the runs 48 and 51 of therespective pulley belts 47 and 50, and with respect to yarns passingbetween the runs 48 and 51, the run 48 is a lower run and the run 51 isan upper run. It will be noted, with reference to FIGURE 2, that theruns 48 and 51 of the respective pulleys 47 and 50 are disposed asviewed in FIGURE 2, with the runs 48 and 51 partially horizontallyadjacent each other to preclude a straight line path of yarn from theupper surface 28 of the heater 27 to a' downstream pair of nip rolls 52and 53, the rolls 52 and 53 being carried between the frame sideextensions 13 and 14. Also, the lower and upper runs 48 and 51respectively, are offset longitudinally of the machine, and are thus notdisposed in vertical alignment. This facilitates the tendency for yarnsconveyed between the runs 48 and 51 to follow the rounded configurationof the runs 48 and 51, for a slight arc, for a purpose later to bedescribed.

The shafts 38 and 40 also carry respective pulleys 54 and 55, which arerotatably connected by means of a toothed belt 56, for rotation of thepulleys 54 and 55, and consequently for rotation of the shafts 38 and 40in the same direction. A gear 57 is carried by the shaft 38, being keyedor otherwise suitably secured to the shaft. A shaft 58 also extendslongitudinally from the gear 57, and a motor 60 is mounted on the frameside extension 13, for rotatably driving the shaft 58, the gear 57 the 4shaft 38, and the pulleys 41 and 54 and consequently the pulleys 55 and42.

Disposed below the apparatus 24 which is adapted to provide texturizedyarns which have been twisted in a clockwise direction, is an apparatusgenerally designated by the numeral 62 which is adapted to providetexturized yarns which have been twisted in a counterclockwise directionas viewed looking downstream of the knitting machine 10. This apparatus62 is generally similar to the apparatus 24, and includes componentsgenerally mounted directly beneath similar respective components of theapparatus 24.

The apparatus 62 includes a beam 63, mounted between the frame sideextensions 13 and 14, a sley bar 64 having downwardly extending guidepins 65, and upper and lower nip rolls 66 and 67, respectively. Theapparatus 62 also utilizes the lower surface 30 of the heater 27.Disposed downstream of the lower surface 30 of the heater 27 is a sleybar 63 having downwardly depending guide pins 70, and spaced downstreamof the sley bar 68 is a sley bar 71 having depending guide pins 72carried thereby. A pair of downstream nip rolls 73 and 74 are alsoprovided, disposed between the frame sides 13 and 14, as are the othercomponents, beneath their respective counterparts in the apparatus 24.

Between the sley bars 68 and 71 there is disposed a pair of pulley belts75 and 76. The pulley belt 75 is carried be tween a pair of pulleys 77and 78, carried on respective shafts 80 and 81, which are, in turn,carried by the mounting brackets 35 and 34, respectively. A pulley 82 isalso mounted on the shaft 81.

The pulley belt 76 is disposed about a pair of pulleys 83 and 84 whichare, in turn, carried by a pair of shafts 8'5 and 86, also carried bythe brackets 35 and 34, respectively. A pulley 87 is also mounted on ashaft 86, for rotation therewith, and is driven through a toothed belt88 from the pulley 82 carried by the shaft 81.

A gear 90 is also carried by the shaft 81, and provides driving rotationfor the shafts 80, 81, 85 and 86 in that it is engaged with the gear 57carried by the shaft 38.

The pulley belts 75 and 76 of the apparatus 63 provide respective upperand lower belt runs 91 and 92.

The upper and lower belt runs 91 and 92 are also offset longitudinallyof the apparatus 62, and are disposed partially adjacent each otherhorizontally to preclude a straight line path from the surface 30 of theheater 27 to the nip between the downstream rolls 73 and 74, as viewedin FIGURE 2.

The pulley belts 47, 50, 75 and 76 are generally of circular, oval, orany other arcuate cross section or the like, and may be constructed ofrubber or similar synthetic materials having the desired frictioncharacteristics for providing twist to yarns conveyed therebetween, in amanner later to be described.

Downstream of the rolls 52, 53, and 73 and 74, there is provided astandard knitting machine roll 93, disposed between the frame sides 11and 12, for rotation. Yarns passing through both of the apparatus 24 and62 in a downstream direction are delivered to and over the roll 93, andconventionally through the remaining portions of the knitting machine10.

Drive means 94 are provided for the rolls 25; 26, 52; 53, 66; 67, and73; 74 comprising pulleys 95 and 96 disposed at ends of the rolls andconnected by one or more pulley belts 99. A suitable motor (not shown)is provided for driving the pulleys 95 and 96 and pulley belt 97.

OPERATION With reference to FIGURE 2, it is apparent that yarn Y arethreaded from the beam 18, between the pins 23 of the sley bar 22,between the nip of the rolls 25 and 26, over the surface 28 of theheater 27, between the pins 33 of the sley bar 32, over the run 48 ofthe pulley belt 47, under the run 51 of the pulley belt 50, between thepins 37 of the sley bar 36, and through the nip of the rolls 52 and 53.The yarns Y are threaded in a similar manner, from the beam 63, betweenthe pins 65 of the sley bar 64, between the nip of the rolls 66 and 67,over the surface 30 of the heater 27, between the pins 70 of the sleybar 68, beneath the run 91 of the pulley belt 75, over the run 92 of thepulley belt 76, between the pins 72 of the sley bar 71, and between thenip of the rolls 73 and 74. Upon operation of the knitting machine 10,the yarns Y and Y are continuously drawn through the apparatus 24 and62.

Upon operation of the motor 60, during the conveying of the yarns Y andY through their respective apparatus 24 and 62, the gears 57 and 90 areoppositely rotated, as shown in FIGURE 3, such rotation being providedthrough the various pulleys and belts illustrated, such that the beltrun 51 is directed toward the right, as viewed in FIGURE 3, and the beltrun 48 is directed to the left, as viewed in FIGURE 3, with the yarns Ypassing therebetween.

The belt run 91 is directed leftward, as viewed in FIG- URE 3, and thebelt run 92 is directed to the right as viewed in FIGURE 3, with theyarns Y passing downstream therebetween.

With reference to FIGURE 4, it is readily apparent that each downstreammoving yarn Y passes over the upper surface of the lower run 48, andbeneath the lower surface of the upper run 51, such engagement of theyarns Y by the runs 48 and 51 being adapted to provide each yarn Y witha clockwise direction of false twist as illustrated in FIGURE 4.

Similarly, the runs 91 and 92 provide each yarn Y with acounterclockwise direction of false twist as indicated in FIGURE 5.

Thus, with reference to the apparatus 24, a plurallty of yarns Y passingbetween the oppositely moving runs 48 and 51 are provided with aclockwise direction of twist. This twist is continuously applied, andextends across the entire twist zone between the rolls 25, 26 and therolls 52, 53. The longitudinally moving yarns Y in this twist zone aresubjected to a desired amount of heat from the heater 27, in passingover the upper surface 28 of the heater 27, for heat-setting the yarns,in their twisted condition. However, because the twist willexponentially diminish beyond the downstream rolls 52, 53, due to thatsubstantially greater length for accommodating the spread, as comparedto the length of the twist zone, the twist which has been applied by theoppositely moving belt runs 48 and 51 and which has been set therein bythe heater 27 is spread over the increased yarn length downstream of therolls 52, 53, thus effectively providing a high degree of untwisting ofthe yarns Y after they pass through the nip between the rolls 52 and 53,and again re-orienting the filaments 0f the yarns Y and leaving them ina highly bulked and texturized condition.

The yarns Y are subjected to the same conditions of false twisting andheating as are the yarns Y and are untwisted as they pass through thenip between the rolls 73 and 74, the yarns Y differing from the yarns Yonly in the direction of the applied twist. The result of the oppositelyapplied twist to the yarns Y and Y is to supply alternately twistedyarns to a knitting portion of a knitting machine 10, the composite yarnsupply meas ured transversely of the machine being balanced.

It will be noted that the sets of pins 23, 33, 37 65, 70, and 72 performonly guiding functions, in maintaining the yarns passing therebyseparated from one another, and thus provide yarn paths through theapparatus 24 and 62, and eliminate yarn entanglements and the like.

The heater 27 may be raised to any desirable temperature, such as willeffect the desired heat-setting of the yarn filaments. Similarly, thenip rolls 25; 26, 52; 53, 66; 67, and 73; 74 may be set at desirable nippressures and speeds to provide end limits for the twist zones of theapparatus 24 and 62, and to provide yarn tension between roll setsoperated at different speeds, if desired.

The relative positions of the runs 51 and 91, with respect to theirassociated runs 48 and 92, may be varied, as desired, depending upon thedesired degree of twist for the yarns Y and Y The desired quality of thebulked yarns Y and Y may be a controlling factor, in placing theindividual yarn runs, as it will in determining the speed of transversemovement of the runs. As has been set forth above, the runs 48 and 51,as well as the runs 91 and 92 are offset longitudinally from one another, such that the yarns Y follow the rounded contour of each of thebelt runs 48 and 51, for a slight distance, to provide sufiicientsurface engagement of the yarns Y by the belt runs 48 and 51, to enablethe desired twisting, as well as to facilitate twisting under thedesired pressure, the vertical offset in the paths of the yarns Ypassing between the belt runs 48 and 51 also providing the desired forceof engagement of the yarns Y by the belt runs 48 and 51. A similarphenomenon is experienced by the yarns Y in their contact by andmovement between the belt runs 91 and 92.

It will be noted by reference to FIGURE 1, and in particular to thedetailed views of FIGURES 4 and 5, that there is a tendency for eachbelt run which comes in contact with longitudinally moving yarns tocarry the yarns transversely of the apparatus 24 or 62, at an angle tothe usual path of movement of yarn longitudinally to the knittingmachine 10, if no false twisting pulley belts 47, 50, 75, and 76 wereprovided. In order to overcome this effect, the beams 18 and 63 aremounted in offset relation to a longitudinal center line (not shown) ofthe machine 10, more close to the frame side extension 13 than to theframe side extension 14. Thus, yarns which are drawn, for example, fromthe beam 18 and pass over the run 48, have a tendency to be drawn towardthe frame side 14. Similarly, yarns which pass from the run 48 to therun 51 have a tendency to follow the movement of the run 51 toward theframe side 13 thereby providing the angular offsets in the yarn pathsbetween the pulley belts 47 and 50, as illustrated in plan in FIG. URE1.

Once the desired speed of pulley belt rotation is known, the beams 18and 63 may then be offset an amount sufiicient to compensate for thistendency of the yarn portions to follow moving belt runs by which theywill next be engaged during the false twisting operation.

It will be noted with reference to FIGURE 1, that the beam 63 isdisposed offset toward the frame side 13, directly beneath the beam 18,due to the positions and relative movement of the belt runs 91 and '92.

The pulley belt 50 may be disposed for vertical movement relative to thepulley belt 47, if desired, to facilitate threading of the yarns Ytherebetween. Similarly, the pulley belts 75 and 76 may also be mountedfor relative vertical movement to facilitate threading.

A cooling zone (not shown) may be provided just downstream of the heater27, if desired. Cooling of the heated yarns may be done by forced air,or often by the ambient air in the machine vicinity, or by any othersuitable means.

The motor '60 which drives the pulley belts may be replaced by a driveconnection to the main drive (not shown) of the knitting machine, if asynchronous drive is desirable.

The term yarn processing machine shall include knitting, weaving, andtufting machines, devices for winding yarn or spools, bobbins or thelike, specialized processing equlpment such as dyeing equipment,prehandling devices, and similar or related machines.

While only a preferred embodiment of the invention has been illustratedand described herein, it will be appreciated that the term yarn is to beread in its broadest sense, and that various modifications may be madein materials components, and relationships of components, withoutdeparting from the spirit of the invention.

What is claimed is:

1. An apparatus for facilitating the provision of texturized yarnscomprising means providing paths for continuous yarn travel, meansdefining a twist zone, means for continuously applying false twists toyarns moving along their paths through the twist zone, and means forsetting twisted yarns in the twist zone, wherein said means forcontinuously applying false twists comprise continuously oppositelymovable belt runs for frictionally engaging and twisting yarns, whereinsaid belt runs are disposed transversely of the direction of yarn travelfor receiving a plurality of yarns therebetween, wherein said runs aredisposed for off-setting the paths of yarn travel therebetween from acommon plane taken through a plurality of laterally spaced yarnsdelivered to said runs.

2. The apparatus as defined in claim 1, wherein said belt runs compriseadjacent portions of separate pulley belts, and means are provided fordriving the belts in the same direction.

3. The apparatus as defined in claim 2, wherein said belts are ofcurved-periphery cross section.

4. An apparatus for facilitating the provision of texturized yarnscomprising means providing paths for continuous yarn travel, meansdefining a twist zone, means for continuously applying false twists toyarns moving along their paths through the twist zone, and means forsetting twisted yarns in the twist zone, wherein said means forcontinuously applying false twists comprise continuously oppositelymovable belt runs for frictionally engaging and twisting yarns, whereinone of said belt runs is disposed slightly upstream relative to theother of said runs.

5. The apparatus as defined in claim 1, wherein said setting meanscomprises means for heat-setting the yarns.

6. The apparatus as defined in claim 1, wherein said means defining atwist zone comprises upstream and downstream nip-forming roller pairsfor forming twist zone end limits.

7. The apparatus as defined in claim 1, wherein said means definingpaths comprise sley bars.

8. The apparatus as defined in claim 4, including means for continuouslysupplying angularly offset yarns in a downstream direction to saidupstream run from a laterally ofiset source.

9. The apparatus as defined in claim 1, wherein said means which defineone end of a twist zone comprise rolls which provide a nip for removingtwist from yarns passed therethrough.

10. The apparatus as defined in claim 8, wherein said source is offsetin a direction opposite to the direction of travel of said upstream beltrun.

11. An apparatus for facilitating the provision of texturized yarnscomprising means providing paths for continuous yarn travel, meansdefining a twist zone, means for continuously applying false twists toyarns moving along their paths through the twist zone, and means forsetting twisted yarns in the twist zone, wherein said means forcontinuously applying false twists includes means for oppositelytwisting yarns across said apparatus.

12. The apparatus as defined in claim 11, wherein said latter meanscomprise upper and lower pairs of continuously opposite movable beltruns.

13. The apparatus as defined in claim 12, wherein one belt run of eachsaid pair of belt runs is disposed slightly upstream of the other beltrun in its pair and wherein means are provided for driving the upstreammost belt run in each pair in the same direction transversely of theapparatus.

14. The apparatus as defined in claim 11, wherein said latter meanscomprise means for twisting adjacent yarns across the apparatus inalternate clockwise and counterclockwise directions, said twisting meansincluding pairs of continuously oppositely movable belt runs.

15. A yarn processing machine comprising a frame, means carried by saidframe for handling texturized yarns, means providing paths forcontinuous yarn travel and defining a twist zone, means carried by saidframe for continuously applying false twists to yarns moving along theirpaths through the twist zone, and means for setting twisted yarns in thetwist zone, wherein said means for continuously applying false twistscomprise continuously oppositely movable belt runs for frictionallyengaging and twisting yarns, wherein said runs are disposed foroff-setting the paths of yarn travel therebetween from a common planetaken through a plurality of laterally spaced yarns delivered to saidruns.

16. The apparatus as defined in claim 15, wherein said belt runs arerelatively positionable into and out of yarn twisting positions.

17. An apparatus for facilitating the provision of texturized yarnscomprising means providing paths for continuous yarn travel, meansdefining a twist zone, means for continuously applying false twists toyarns moving along their paths through the twist zone, and means forsetting twisted yarns in the twist zone, wherein said means forcontinuously applying false twists comprise continuously oppositelymovable belt runs for frictionally engaging and twisting yarns, whereinsaid runs comprise means for simultaneously offsetting the plurality ofyarns conveyed therebetween from their respective paths of travel.

18. The apparatus of claim 17, wherein said runs have cross-sectionalconfigurations permitting the yarns to conform to the external shapes ofthe runs for a portion of their travel between the runs.

References Cited UNITED STATES PATENTS 2,778,186 1/1957 Liittgen et al5790 XR 2,991,614 7/1961 Ubbelohde 57-77.4 XR 3,045,416 7/ 1962Ubbelohde 575 1.6 XR 3,103,097 9/1963 Meili et al. 57-77.4 3,120,0492/1964 Spurgeon 66125 XR 3,148,520 9/1964 Biggers 66125 3,228,181 1/1966Paterson 57-77.4 XR 3,336,738 8/1967 Mattingly et al 5734 3,367,006 2/1968 Mattingly 57-34 XR 3,382,656 5/1968 Crouzet 57-34 3,398,220 8/1968Port et al. 28-72 XR DONALD E. WATKINS, Primary Examiner U.S. C1.X.R.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3 ,482,384 December 9 1969 Emil J. Berger, Jr.

It is certified that error appears in the above identified patent andthat said Letters Patent are hereby corrected as shown below:

line 35, after "14" and before the period,

Column 6,

f the runs 48 toward the insert because of the movement 0 frame side 14.

Signed and sealed this 16th day of June 1970.

(SEAL) Attest:

Edward M. Fletcher, Jr.

Commissioner of Patents Attesting Officer WILLIAM E. SCHUYLER, JR.

